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c8a8c63008
This patch adds the following Kconfig options to prepare the transition to
common clk framework:
- AT91_USE_OLD_CLK: this option is selected by every SoC which does not
support new at91 clks based on common clk framework (SoC which does not
define the clock tree in its device tree).
This options is also selected when the user choose non dt boards support
(new at91 clks can only be registered from a device tree definition).
- COMMON_CLK_AT91: this option cannot be selected directly. Instead it is
enabled if these 3 conditions are met:
* at least one of the selected SoCs have a PMC (Power Management
Controller) Unit
* device tree support is enabled
* the old at91 clk implementation is disabled (every selected SoC define
its clks in its device tree and non dt boards support is disabled)
- OLD_CLK_AT91: this option cannot be selected directly. Instead it is
enabled if these 2 conditions are met:
* at least one of the selected SoCs have a PMC (Power Management
Controller) Unit
* at least one of the selected SoCs does not define its clks in its
device tree or non dt-boards support is enabled
This patch selects AT91_USE_OLD_CLK in all currently supported SoCs. These
selects will be removed after clk definitions are properly added in each
soc's device tree.
It also selects AT91_USE_OLD_CLK in all non-dt boards support.
AT91_PMC_UNIT references are replaced by OLD_CLK_AT91, because PMC Unit is
enabled for both old and common clk implementations, and old clk
implementation should not be compiled if COMMON_CLK is enabled.
To avoid future link errors, a new stub is created for at91_dt_clock_init
function if OLD_CLK_AT91 is disabled.
A new check is added in dt init functions (setup.c) to prepare for SoCs
supporting new clk implementation. These SoCs won't setup the
register_clocks callback (clk registration is done using of_clk_init).
Signed-off-by: Boris BREZILLON <b.brezillon@overkiz.com>
Acked-by: Mike Turquette <mturquette@linaro.org>
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
93 lines
2.9 KiB
C
93 lines
2.9 KiB
C
/*
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* linux/arch/arm/mach-at91/generic.h
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*
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* Copyright (C) 2005 David Brownell
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/clkdev.h>
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#include <linux/of.h>
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#include <linux/reboot.h>
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/* Map io */
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extern void __init at91_map_io(void);
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extern void __init at91_init_sram(int bank, unsigned long base,
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unsigned int length);
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/* Processors */
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extern void __init at91rm9200_set_type(int type);
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extern void __init at91_initialize(unsigned long main_clock);
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extern void __init at91x40_initialize(unsigned long main_clock);
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extern void __init at91rm9200_dt_initialize(void);
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extern void __init at91_dt_initialize(void);
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/* Interrupts */
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extern void __init at91_init_irq_default(void);
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extern void __init at91_init_interrupts(unsigned int priority[]);
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extern void __init at91x40_init_interrupts(unsigned int priority[]);
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extern void __init at91_aic_init(unsigned int priority[],
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unsigned int ext_irq_mask);
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extern int __init at91_aic_of_init(struct device_node *node,
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struct device_node *parent);
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extern int __init at91_aic5_of_init(struct device_node *node,
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struct device_node *parent);
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extern void __init at91_sysirq_mask_rtc(u32 rtc_base);
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extern void __init at91_sysirq_mask_rtt(u32 rtt_base);
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/* Timer */
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extern void at91rm9200_ioremap_st(u32 addr);
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extern void at91rm9200_timer_init(void);
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extern void at91sam926x_ioremap_pit(u32 addr);
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extern void at91sam926x_pit_init(void);
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extern void at91x40_timer_init(void);
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/* Clocks */
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#ifdef CONFIG_OLD_CLK_AT91
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extern int __init at91_clock_init(unsigned long main_clock);
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extern int __init at91_dt_clock_init(void);
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#else
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static int inline at91_clock_init(unsigned long main_clock) { return 0; }
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static int inline at91_dt_clock_init(void) { return 0; }
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#endif
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struct device;
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/* Power Management */
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extern void at91_irq_suspend(void);
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extern void at91_irq_resume(void);
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/* idle */
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extern void at91sam9_idle(void);
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/* reset */
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extern void at91_ioremap_rstc(u32 base_addr);
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extern void at91sam9_alt_restart(enum reboot_mode, const char *);
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extern void at91sam9g45_restart(enum reboot_mode, const char *);
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/* shutdown */
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extern void at91_ioremap_shdwc(u32 base_addr);
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/* Matrix */
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extern void at91_ioremap_matrix(u32 base_addr);
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/* Ram Controler */
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extern void at91_ioremap_ramc(int id, u32 addr, u32 size);
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/* GPIO */
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#define AT91RM9200_PQFP 3 /* AT91RM9200 PQFP package has 3 banks */
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#define AT91RM9200_BGA 4 /* AT91RM9200 BGA package has 4 banks */
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struct at91_gpio_bank {
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unsigned short id; /* peripheral ID */
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unsigned long regbase; /* offset from system peripheral base */
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};
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extern void __init at91_gpio_init(struct at91_gpio_bank *, int nr_banks);
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extern void __init at91_gpio_irq_setup(void);
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extern int __init at91_gpio_of_irq_setup(struct device_node *node,
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struct device_node *parent);
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extern u32 at91_get_extern_irq(void);
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